CN101798902A

CN101798902A - Connecting sleeve for extension ladder

Info

Publication number: CN101798902A
Application number: CN 201010127269
Authority: CN
Inventors: 王万兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-17
Filing date: 2010-03-17
Publication date: 2010-08-11
Anticipated expiration: 2030-03-17
Also published as: EP2549054A1; EP2549054B1; CN101798902B; WO2011113183A1; EP2549054A4

Abstract

The invention relates to a connecting sleeve used for telescopic ladders, which comprises a connecting ring (1) and a connecting block (2) connected as one, and is arranged on the surface of the joint between the connecting ring (1) and the connecting block (2). There is a swivel base (3) and a rotating plate (4), wherein the swivel base (3) is fixed relative to the connecting ring (1), the swivel base (3) has a socket (31) in the center, and the two sides of the socket (31) are respectively Extend a rotating shaft (32) to the center, the vertical part (41) of rotating plate (4) is inserted in the socket (31), and, rotating shaft (32) is provided with a torsion spring (5) outside, and this torsion spring (5) makes The transverse part (41) of the rotating plate (4) can rotate toward the connecting block (2) with the rotating shaft as the center and always has a tendency to stand up above the rotating seat (3). Compared with the prior art, when the present invention is in normal use, there is a fixed distance between the upper and lower cross bars of the telescopic ladder due to the rotating plate to accommodate fingers, which effectively prevents the upper cross bar from being pressed against when the telescopic ladder is folded. Fingers located on the lower cross bar, and when the product is packaged and shipped, the overall height will not be too high.

Description

A kind of adapter sleeve that is used for extension ladder

Technical field

The present invention relates to the technical field of extension ladder, relate in particular to a kind of adapter sleeve that is used for extension ladder.

Background technology

Ladder is quite extensive in the use in building, finishing, advertisement, home dwelling field.At present, more welcome on the market is the extension ladder that can stretch up and down, and it can shorten and be easy to take in, carry when not using.As the patent No. is the patent formerly " a kind of telescopic ladder " of ZL200420091638.2 (notification number is CN2716479Y), disclose so a kind of extension ladder, it comprises cross bar and montant, montant is socketed to form for number joint sleeve pipe telescopically, many cross bars place between the two relative montants, be respectively arranged with telescopic pivot pin at the two ends of every cross bar, this pivot pin is respectively with to open in sleeve pipe positioning jack corresponding with it suitable, be equipped with annular adapter sleeve in every joint sleeve pipe upper end, and this adapter sleeve and cross bar link together.This extension ladder in use owing to there not be fixing space between the last sheer pole, and user's both hands are generally just held up on a certain cross bar, when drawing extension ladder in, there is unsafe hidden danger in the finger below the cross bar of top can be pressed onto and be shelved on the cross bar.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of adapter sleeve that is used for extension ladder at the present situation of prior art, it makes has fixing spacing between the sheer pole, when preventing that effectively extension ladder from drawing in, cross bar is pressed onto finger, and during packing of product transportation, whole height again can be not too high, is very suitable for actual use.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this is used for the adapter sleeve of extension ladder, comprise the connecting ring and the contiguous block that are connected as a single entity, it is characterized in that: the surface, junction between connecting ring and the contiguous block is provided with a swivel base and rotor plate;

Wherein, the relative connecting ring of described swivel base is fixed, and swivel base central authorities have socket, and the dual-side of socket is extended with a rotating shaft to central authorities respectively;

Described rotor plate is the T type substantially, and it vertically partly is inserted in the socket of swivel base, and its lateral part is positioned on the swivel base, and two rotating shafts on the swivel base laterally are inserted in the axis hole of vertical part;

And, the axis hole of the vertical part of described rotor plate is interior, rotating shaft is outside equipped with a torsion spring, one end of this torsion spring links to each other with the axis hole of rotor plate inboard, the other end links to each other with swivel base, and makes the lateral part of rotor plate be middle mind-set contiguous block direction rotation and to have the trend that erects to the swivel base top all the time with rotating shaft.

It is outer and link to each other with montant that above-mentioned connecting ring is set in the sleeve pipe of corresponding montant, and it is interior and link to each other with cross bar that the contiguous block end is inserted into cross bar.

For further guaranteeing the both hands that can effectively protect the user that are provided with of swivel base and rotor plate, the height of described rotor plate is greater than the thickness of finger.

For ease of parts assemblings, described swivel base can by about two branch swivel bases be spliced, the bottom of dividing swivel base plugs on the junction between connecting ring and the contiguous block by projection.

As further improvement, it is trapezoidal that the lateral part of described rotor plate can be, so, the top of lateral part have horizontal surface and be convenient to cross bar bottom, top against, the thickness of rotor plate and the thickness of swivel base adapt, so, when rotor plate was erect, itself and swivel base constituted an integral body, and the surface is clean and tidy, the lateral part folding of rotor plate is poured on swivel base one rear flank, and the surface of rotor plate flushes with the top surface of swivel base substantially.

For guaranteeing that rotor plate can protect finger when holding up, the whole height of described rotor plate is being good more than or equal to 2CM.

Compared with prior art, the invention has the advantages that: pass through swivel base, rotor plate and the setting of torsion spring between the two, making the lateral part of rotor plate can be the center with the rotating shaft, rotate relative to swivel base and adapter sleeve itself, when extension ladder normally uses, because the relative all the time swivel base of rotor plate upwards erects, be separated by and have fixing spacing owing to rotor plate between the last sheer pole, this spacing can be held finger, and when preventing that effectively extension ladder from drawing in, the cross bar of top is pressed onto the finger that is positioned on the cross bar of below, and, when the extension ladder packed and transported, the lateral part folding of rotor plate can be fallen, be positioned at a side of swivel base, so, this spacing of height of having only swivel base between the last sheer pole, when making packing of product transportation, whole height again can be not too high, is very suitable for actual use.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the embodiment of the invention rolls over state at rotor plate a structural representation;

Fig. 3 is the three-dimensional exploded view of the embodiment of the invention.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Application has the extension ladder of the embodiment of the invention, comprise two montants that are oppositely arranged and be fixed on many cross bars between two montants, montant comprises that the telescopic internal and external casing of two joints is socketed to form, between two relative sleeve pipes, be fixed with a cross bar with joint, and the two ends of each cross bar are by the sleeve pipe relative fixed of adapter sleeve with the corresponding montant of the embodiment of the invention;

As Fig. 1, Fig. 2 and shown in Figure 3, the adapter sleeve that this is used for extension ladder comprises the connecting ring 1 and the contiguous block 2 that are connected as a single entity, and the surface, junction between connecting ring 1 and the contiguous block 2 is provided with a swivel base 3 and rotor plate 4;

Wherein, connecting ring 1 is sheathed fixing with the sleeve pipe of corresponding montant, and contiguous block 2 plugs in the end of corresponding cross bar;

Described swivel base 3 by about two branch swivel base 3a be spliced, divide swivel base 3a to plug connecting ring 1 one sides by the projection 33 of bottom, thereby connecting ring 1 is fixing relatively, swivel base 3 central authorities have socket 31, and the dual-side of socket 31 is extended with a rotating shaft 32 to central authorities respectively;

Described rotor plate 4 is the T type substantially, and its whole height is 3CM, and its vertical part 41 is inserted in the socket 31 of swivel base 3, and its lateral part 42 is trapezoidal and is positioned on the swivel base 3, and the thickness of the thickness of rotor plate 4 and swivel base 3 is basic identical;

Two rotating shafts 32 on the swivel base 3 laterally are inserted in the axis hole 41a of vertical part 41, and the lateral part 42 of this rotor plate 4 can be rotated around this rotating shaft 32, and make the lateral part 42 of rotor plate 4 turn to a side of swivel base 2, and also, contiguous block 2 foldings fall relatively;

And, in the axis hole 41a of described rotor plate 4 vertical parts 41, rotating shaft 32 is outside equipped with a torsion spring 5, one end 51 of this torsion spring 5 links to each other with the axis hole 41a of rotor plate 4 is inboard, the other end 52 links to each other with swivel base 3, and the lateral part 41 of rotor plate 4 can be middle mind-set contiguous block 2 directions rotation and have the trend that erects to swivel base 3 tops all the time with rotating shaft 32, also be, under the situation that no external force applies, the lateral part 41 of rotor plate 4 all the time up, when practical application, make between the last sheer pole of extension ladder and be separated by by whole rotor plate 4 and swivel base 3, have only the lateral part 41 of rotor plate 4 applying under the situation of external force, could fall towards contiguous block 2 foldings, make between the sheer pole and only be separated by by this swivel base 3.

Claims

1. A connecting sleeve for telescopic ladders, comprising a connecting ring (1) and a connecting block (2) connected together, characterized in that: at the joint between the connecting ring (1) and the connecting block (2) A swivel seat (3) and a swivel plate (4) are arranged on the surface;

Wherein, the swivel seat (3) is fixed relative to the connecting ring (1), and a socket (31) is opened in the center of the swivel seat (3), and a rotating shaft (32) extends from both sides of the socket (31) to the center respectively;

The rotating plate (4) is basically T-shaped, its vertical part (41) is inserted into the socket (31) of the swivel seat (3), its transverse part (42) is located on the swivel seat (3), and the swivel The two rotating shafts (32) on the seat (3) are laterally inserted into the shaft holes (41a) of the vertical part (41);

And, in the shaft hole (41a) of the vertical part (41) of the rotating plate (4), a torsion spring (5) is arranged outside the rotating shaft (32), and one end (51) of the torsion spring (5) is connected to the rotating plate. The inner side of the shaft hole (41a) of (4) is connected, and the other end (52) is connected with the swivel seat (3), so that the lateral part (41) of the rotating plate (4) can be centered on the rotating shaft to the direction of the connecting block (2) Rotate and have the tendency of standing up to the top of the swivel seat (3) all the time.

2. The connecting sleeve for telescopic ladder according to claim 1, characterized in that: the swivel seat (3) is spliced by two sub-swivel seats (3a) on the left and right, and the sub-swivel seat (3a) passes through the bottom The protruding post (33) is inserted into the joint between the connecting ring (1) and the connecting block (2).

3. The connecting sleeve for telescopic ladder according to claim 1 or 2, characterized in that: the thickness of the rotating plate (4) is adapted to the thickness of the rotating seat (3).

4. The connecting sleeve for telescopic ladder according to claim 1 or 2, characterized in that: the overall height of the rotating plate (4) is greater than or equal to 2CM.